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<title>Get port number associated with an Internet service and protocol</title>
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<h1 class="refname">getservbyname</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">getservbyname</span> — <span class="dc-title">Get port number associated with an Internet service and protocol</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.getservbyname-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>getservbyname</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$service</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$protocol</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>getservbyname()</strong></span> returns the Internet port
which corresponds to <em><code class="parameter">service</code></em> for the
specified <em><code class="parameter">protocol</code></em> as per
<var class="filename">/etc/services</var>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.getservbyname-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">service</code></em></span>
<dd>
<p class="para">
The Internet service name, as a string.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">protocol</code></em></span>
<dd>
<p class="para">
<em><code class="parameter">protocol</code></em> is either <em>"tcp"</em>
or <em>"udp"</em> (in lowercase).
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.getservbyname-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the port number, or <strong><code>FALSE</code></strong> if <em><code class="parameter">service</code></em> or
<em><code class="parameter">protocol</code></em> is not found.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.getservbyname-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4480">
<p><strong>Example #1 <span class="function"><strong>getservbyname()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$services </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'http'</span><span style="color: #007700">, </span><span style="color: #DD0000">'ftp'</span><span style="color: #007700">, </span><span style="color: #DD0000">'ssh'</span><span style="color: #007700">, </span><span style="color: #DD0000">'telnet'</span><span style="color: #007700">, </span><span style="color: #DD0000">'imap'</span><span style="color: #007700">,<br /></span><span style="color: #DD0000">'smtp'</span><span style="color: #007700">, </span><span style="color: #DD0000">'nicname'</span><span style="color: #007700">, </span><span style="color: #DD0000">'gopher'</span><span style="color: #007700">, </span><span style="color: #DD0000">'finger'</span><span style="color: #007700">, </span><span style="color: #DD0000">'pop3'</span><span style="color: #007700">, </span><span style="color: #DD0000">'www'</span><span style="color: #007700">);<br /><br />foreach (</span><span style="color: #0000BB">$services </span><span style="color: #007700">as </span><span style="color: #0000BB">$service</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$port </span><span style="color: #007700">= </span><span style="color: #0000BB">getservbyname</span><span style="color: #007700">(</span><span style="color: #0000BB">$service</span><span style="color: #007700">, </span><span style="color: #DD0000">'tcp'</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$service </span><span style="color: #007700">. </span><span style="color: #DD0000">": " </span><span style="color: #007700">. </span><span style="color: #0000BB">$port </span><span style="color: #007700">. </span><span style="color: #DD0000">"<br />\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.getservbyname-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.getservbyport.html" class="function" rel="rdfs-seeAlso">getservbyport()</a> - Get Internet service which corresponds to port and protocol</span></li>
<li class="member">
<a href="http://www.iana.org/assignments/port-numbers" class="link external">» http://www.iana.org/assignments/port-numbers</a>
for a complete list of port numbers.
</li>
</ul>
</p>
</div>
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